Bond fund giant Pacific Investment Management Co said on Tuesday the pace of Federal Reserve interest-rate increases is likely to be even more gradual than the firm expected in March and that the U.S. central bank may find it impossible to escape the effective lower bound of policy rates. Pimco said in its quarterly Cyclical Forum outlook report that it cut its forecast for U.S. economic growth in the next 12 months to between 2.25 percent and 2.75 percent, from 2.5 percent and 3 percent in March. "In contrast to robust consumption and housing, business investment confronts the headwinds from low oil prices and cutbacks in ...